Bandeau CJB Back to Welcome Back to Welcome
EXPLORATION CONSERVATION RESEARCH TRANSMISSION PROTECTION
Museums of Geneva
 MUSEUM
PRACTICAL INFORMATION
KNOW HOW
FRANÇAIS | ENGLISH  

Follow us on Facebook !

interroGE - la réponse est humaine

Fil rss des CJB*

 * = may be in french
séparation
Actuellement en fleur au Jardin
It's blooming in our Garden (in french)
séparation
focus podcast Vidéos
Podcast Vidéos

Opening Hours
Address and Access
Services
Contacts
Shortcut*
Scientific Activities*
Teaching*
Publications*
Library
Databases
Passion for Knowledge
séparation
Living collections management policy 2018
NEW!
What plants do we grow at the CJBG and why??
Find all the answers HERE !
séparation
Sunday visits
Each 1st Sunday of the month - 2 guided tours
Upcoming visit: 5 August !
Discover the programme !
séparation
Variations botaniques
Next visit 17 July.
Register now
séparation
La Visite du Jardinier
La "Visite du Jardinier"
Every Thursdays at 2pm
séparation
Moutons ProSpecieRara
6 breeds of sheep ProSpecieRara
brought together at the CJBG Read the article
séparation
The great forest
From 23 June to 2 Sept.
The Brazilian great forest.
NEW EXHIBITION
séparation
The Passion for Knowledge
Exhibition
Until 14th of October
séparation
The Garden, 200 years of passion
Exhibition
Until 14th of October
séparation
The many lives of herbaria
Exhibition
Cabinet of curiosities
séparation
Discover the exhibition
The Ethnobotanical Gardens
séparation
ombrage

Conservatoire et Jardin botaniques de la Ville de Genève


WelcomeScientific ActivitiesProjects
impression
séparation

Systematics of the lichen genus Usnea Adans.

The diversity of species, the taxonomy, the chorology, the ecology and the phylogeny of Usnea species is studied, particularly in Europe, Africa, North and South America.

Taxonomy and phylogeny of the Usnea species occuring in the tropical Andes (Bolivia, Colombia, Ecuador, Peru and Venezuela) and the Galapagos Islands, through the study of morphology, anatomy, chemistry, ecology and phylogenetics.

The taxonomy of the lichen genus Usnea in Europe remains poorly known. Numerous species have been described by Josef Motyka in his monograph "Lichenum Generis Usnea Studium Monographicum" published between 1936 et 1938. Environmental conditions can strongly influence the morphology of Usnea species and several of these species are now considered as morphotypes of the same species. Numerous characters used by Motyka in his identification keys are not diagnostic and leads to misleading identifications. This project aims to revise the taxonomy of European Usnea species, by providing detailed description of the species and their full (morphological, anatomical and chemical) intra-specific variation, together with a nomenclatural revision of the synonyms.

Taxonomy and systematics of the lichen genus Usnea in North America, through the study of morphology, anatomy, chemistry, and ecology.

A world checklist of the genus Usnea (Ascomycota, Parmeliaceae) is in preparation. Data on the status of the names (accepted names, synonyms, illeg. Names, etc.), on the protolog, on the type material (locality and herbarium) will be given.